Re: [CAD_CAM_EDM_DRO] Re: Reducing diameter of a ball screw shaft.

Hi,

Further to my earlier post:

If the lathe has a hole through the spindle big enough to tale the ballscrew
you are on to a winner in setting up. First machine up a sleeve the OD
should fit the bore of the lathe closely with the ID to fit the ballscrew.
This to stop the ballscrew flying around when you `machine the end. The
ballscrew should protrude from the chuck with a minimum of over-hang. Using
an independent four jaw chuck and clock the ballscrew to run absolutely
true, even a small flicker on the clock should not be allowed.

I have used both methods, mentioned in my earlier post, and much prefer a
tool-post grinder but I was successful with TCT using the largest tooling I
could fit in the tool-post with brazed on tips. The tip was a milling one I
brazed on myself because of the interrupt cutting.

Regards,

Terry

> > Hi,
> >
> > You can machine the ends in one of two ways, use a tool-post grinder
> or if
> > the metal is soft enough use TCT tooling.
> >
> > Regards,
> >
> > Terry
>
>
> You can also weld an extension on the end and machine that.
>
> Or, make a sleeve and put that on.
>
>
> The screws I have are hard and carbide tooling in the lathe took a
> beating before I gave up. carbide does not like interupted cuts such
> as the threads.
>
> Next time it will be an hour at the post grinder to get down to the
> minor diameter or weld extentions.
>
>
> Dave